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Effect of titanium on the as-cast microstructure and impact toughness of hypereutectic high-chromium cast iron

  • Zhifu Huang , Jiandong Xing , Yimin Gao and Xiaohui Zhi
Published/Copyright: June 11, 2013

Abstract

The effect of titanium on the as-cast microstructure of a hypereutectic high-chromium cast iron was investigated by means of optical microscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results indicate that the primary M7C3 carbides are refined and spheroidized with the addition of a suitable amount of titanium. TiC is found in the primary carbide by energy dispersive spectroscopy analysis. The mechanism of titanium modification on the microstructure of the alloy is also discussed. In addition, the impact test result indicates that, compared with the hypereutectic high-chromium cast iron without titanium addition, the impact toughness value of hypereutectic high-chromium cast iron with titanium additions is improved and approximately reaches 6.4 J · cm−2.


* Correspondence address Dr. Huang Zhifu School of Materials Science and Engineering Xi'an Jiaotong University 28 Xianning West Road Xi'an, Shanxi Province 710049, PR China Tel.: +86 29 82665479 Fax: +86 29 82665479 E-mail:

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Received: 2009-10-12
Accepted: 2011-12-11
Published Online: 2013-06-11
Published in Print: 2012-05-01

© 2012, Carl Hanser Verlag, München

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